Unable to store historical data from api

My api gives me the current date data every time for new date and I want to store the historical data and to add the new current date data.

But while refreshing the data gets overwritten and the past data gets lost.

Please share any solution.

WEB API:

http://wmsapi.aajenterprises.com/WMSReport.svc/Json/CartonListwithdate?wcode=1&databasename=eswms@2020_2021&reportdate=2020-10-02